SUP7 SUP9A SUP10 SUP11A 5160 Spring Steel Flat Bar for Leaf Spring

DescriptionPremium Spring Steel Flat Bar for Durable Leaf SpringsAt WONDEE, we prioritize the performance and safety of suspension systems by delivering high-quality spring steel flat bars designed for heavy-duty use. We focus on producing durable and resilient bars in popular grades such as SUP7, SUP9A, SUP10, SUP11A, and 5160 Spring Steel, ensuring they perform reliably in automotive and industrial applications.We follow strict quality standards throughout our manufacturing process and apply our deep industry knowledge to every order. By consistently offering dependable materials with high yield strength and excellent toughness, we’ve earned long-term trust from partners across global markets.Applications and FeaturesApplicationsSpring steel is a versatile material known for its ability to withstand significant bending and twisting forces while returning to its original shape. It is a go-to choice for a wide range of products, including various types of springs, steering arms for air suspension, and even tools like saw blades. The high-performance characteristics of our steel make it especially suitable for automotive leaf springs, vehicle coil springs, and s-tines, where strength and fatigue resistance are paramount.For more about WONDEE’s expertise in manufacturing leaf springs, please click the image below:FeaturesServices quality management systemImplementing ISO9001-2015Product technical standardImplementing GB/T 33164.1-2016, JIS, DIN, ASTMThickness tolerance±0.50 mmThickness tolerance±0.80 mmSide bending≤0.25%Plane bending≤0.50%Hardness/HBW≤360Surface quality:All thickness Max defect depth: 0.15mmSales volume (tons)1,800,000 Warranty18 months since shipping dateComprehensive Info of  Spring Steel Flat Bar:Land area (square meters)2,800,000 Sales volume (tons)1,800,000 Number of employees8000 Technical professionals1200 Market shares50% in ChinaOverseas marketIt takes more than 30% of total quantity of the spring steel flat bar imports in the countries of Southeast Asia, Sout America, North Africa and so on.Available certificatesCOC; PVOC; CIQ; SONCAP; BV; C/O; FORM E.Executive standardsGB, JIS, DIN, ASTM and technical agreement. (GB/T 33164.1-2016; JIS G 4801：2011; EN 10089：2002; EN 10092-1-2003; ASTM A322;ASTM A304-04; SAE J1268；SAE J404).Grades of spring steel flat bar60Si2Mn; 50CrV; 55CrMn; 55SiMnVB;60CrMn;28SiMnB;51CrMnV; 52CrMnMoV; 60Si2CrV; 60CrMnB; 55SiMnVB; 50CrVA 55CrMnA; 60CrMnA; 28MnSiB; 60CrMnBA; SUP7; SUP9; SUP9A; SUP10; SUP11A; 55Cr3; 51CrV4; 61SiCr7; 52CrMoV4; 5160; 5160H; 6150; 6150H; 51B60; 51B60H; SAE5160; SAE5160H; SAE6150; SAE6150H; SAE51B60; SAE51B60H; 52CrMnBA; 50CrMnVA; FAS3550; NHS3.Width x thickness44.5×6; 44.5×8; 45×6; 45×8; 50×6; 50×7; 50×8; 50×9; 50×13; 60×6; 60×7; 60×8; 60×9; 60×10; 60×12; 60×14; 70×6; 70×7; 70×8; 70×9; 70×10; 70×11; 70×12; 70×13; 70×14; 70×6; 75×10; 75×1 1; 75×12; 75×13; 75×14; 75×15; 75×16; 75×18; 75×10; 75×11; 80×10; 80×11; 80×12; 80×13; 80×14; 90×10; 90×11; 90×12; 90×13; 90×14; 90×15; 90×16; 90×18; 90×20; 90×22; 90×25; 100×12; 100×14; 100×16; 100×18; 100×20; 100×22; 100×25; 120×12; 120x 14; 120×16; 120×18; 120×20 …Width rangefrom 44.5 mm to 140 mmThickness rangefrom 6 mm to 59 mmLength rangefrom 3000mm to 7000mmComponentsCutting flat bar, Semi-leaf spring etc.PackageBundleStandards implementedISO9001-2015, GB/T 33164.1-2016, JIS, DIN, ASTMPaymentTT, LC, DPLead timeAbout 30 daysMOQ10 tonsParametersAvailable sizes of spring steel flat bars (With x Thickness)(mm)44.5×660×670×675×1080×1090×10100×1244.5×860×770×775×1180×1190×11100×1445×660×870×875×1280×1290×12100×1645×860×970×975×1380×1390×13100×1850×660×1070×1075×1480×1490×14100×2050×760×1270×1175×15…90×15100×2250×860×1470×1275×1690×16100×2550×9…70×1375×1890×18120×1250×1370×14…90×20120×14……90×22120×1690×25120×18…120×20…Remark:Other sizes are available according to customers’ requestSpring flat bar grade correspondence tableS/NGBISOAISIJISBSNF160Si2Mn61SiCr79260SUP7250A5861SC7255CrMnA55Cr35155SUP955Cr3360CrMnA65MnCr45160SUP9A450CrVA50CrV46150SUP10560CrMnBA60CrB351B60SUP11AProduction & PackagingProductionTo see how our quality leaf springs are manufactured, please visit our YOUTUBE channel:到底We pride ourselves on our large-scale production capabilities and advanced technology. Our workshops are designed for efficiency and precision, allowing us to consistently produce high-quality **spring steel flat bar**. Our skilled professionals and vast land area enable us to meet the demands of both domestic and international markets, ensuring a reliable supply for our clients.PackingOur spring steel flat bars are carefully bundled and prepared for safe container loading, guaranteeing that your order arrives in excellent condition, ready for use.In addition to our spring steel flat bars, WONDEE Autoparts also offers a wide range of other semi-trailer components, as seen in the collection below: